Thanks Tim for building the test kernel, and Hmpf, thanks for testing it and confirming it fixes the problem.
Okay, so the problem is: commit a738c93fb1c17e386a09304b517b1c6b2a6a5a8b Author: Shyam Prasad N <spra...@microsoft.com> Date: Thu Feb 11 03:26:54 2021 -0800 Subject: cifs: Set CIFS_MOUNT_USE_PREFIX_PATH flag on setting cifs_sb->prepath. Link: https://github.com/torvalds/linux/commit/a738c93fb1c17e386a09304b517b1c6b2a6a5a8b Looking at Focal, it seems Tim has submitted the revert and it has been applied for the next kernel update: https://lists.ubuntu.com/archives/kernel-team/2021-April/119241.html https://lists.ubuntu.com/archives/kernel-team/2021-April/119242.html https://lists.ubuntu.com/archives/kernel-team/2021-April/119243.html https://lists.ubuntu.com/archives/kernel-team/2021-April/119244.html https://lists.ubuntu.com/archives/kernel-team/2021-April/119246.html Thanks Tim! As for Bionic, it seems to still be applied to master-next, and hasn't been tagged into a release yet: https://paste.ubuntu.com/p/k9SffBrBMb/ Groovy seems to be in the same situation: https://paste.ubuntu.com/p/wRX79WKpy3/ Tim, are there any plans to get the revert landed in Bionic and Groovy for this cycle? I really don't want cause any regressions if we can avoid it. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1923670 Title: CIFS DFS entries not accessible with 5.4.0-71.74-generic Status in linux package in Ubuntu: Confirmed Status in linux source package in Focal: Fix Committed Bug description: When booting 5.4.0-71-generic I can not access DFS entries anymore, with 5.4.0-70-generic this still works. Some details: fstab entry: //example.com/public /home/user/remote cifs noauto,vers=default,noserverino,users,_netdev,user=remote_user,domain=example.com 0 0 shell session ~$ mount /home/user/remote Password for remote_user@//example.com/public: ~$ ls /home/user/remote/dfs-folder dfs-subfolder dfs-entry ~$ ls /home/user/remote/dfs-folder/dfs-entry ls: cannot access '/home/user/remote/dfs-folder/dfs-entry': No such file or directory dmesg excerpt [ 1219.568778] CIFS: Attempting to mount //DC01.example.com/Public/dfs-folder/dfs-entry [ 1219.584975] FS-Cache: Duplicate cookie detected [ 1219.584986] FS-Cache: O-cookie c=000000006e995395 [p=00000000f4725c61 fl=222 nc=0 na=1] [ 1219.584990] FS-Cache: O-cookie d=00000000a11c1428 n=0000000071ab21ba [ 1219.584993] FS-Cache: O-key=[6] '5075626c6963' [ 1219.585001] FS-Cache: N-cookie c=00000000a0608786 [p=00000000f4725c61 fl=2 nc=0 na=1] [ 1219.585004] FS-Cache: N-cookie d=00000000a11c1428 n=00000000901f6a53 [ 1219.585007] FS-Cache: N-key=[6] '5075626c6963' [ 1219.725834] FS-Cache: Duplicate cookie detected [ 1219.725847] FS-Cache: O-cookie c=000000006e995395 [p=00000000f4725c61 fl=222 nc=0 na=1] [ 1219.725851] FS-Cache: O-cookie d=00000000a11c1428 n=0000000071ab21ba [ 1219.725854] FS-Cache: O-key=[6] '5075626c6963' [ 1219.725864] FS-Cache: N-cookie c=000000000509709f [p=00000000f4725c61 fl=2 nc=0 na=1] [ 1219.725868] FS-Cache: N-cookie d=00000000a11c1428 n=00000000556f158b [ 1219.725870] FS-Cache: N-key=[6] '5075626c6963' [ 1220.216524] CIFS VFS: cifs_read_super: get root inode failed The dmesg from 5.4.0-70-generic does not have the line CIFS VFS: cifs_read_super: get root inode failed ~$ lsb_release -rd Description: KDE neon User Edition 5.21 Release: ~$ lsb_release -rd Description: KDE neon User Edition 5.21 Release: 20.04 20.04 ~$ apt-cache policy linux-image-generic linux-image-generic: Installed: 5.4.0.71.74 Candidate: 5.4.0.71.74 Version table: *** 5.4.0.71.74 500 500 http://de.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages 100 /var/lib/dpkg/status 5.4.0.26.32 500 500 http://de.archive.ubuntu.com/ubuntu focal/main amd64 Packages --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27.16 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC2: dirk 2946 F.... pulseaudio /dev/snd/controlC1: dirk 2946 F.... pulseaudio /dev/snd/controlC0: dirk 2946 F.... pulseaudio CasperMD5CheckResult: skip CurrentDesktop: KDE DistroRelease: KDE neon 20.04 InstallationDate: Installed on 2017-07-27 (1356 days ago) InstallationMedia: neon userlts "Xenial" - Build amd64 LIVE Binary 20170614-00:52 MachineType: LENOVO 20HMS00T00 Package: linux (not installed) ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-71-generic root=/dev/mapper/vg00-lv_root ro intel_iommu=off ProcVersionSignature: Ubuntu 5.4.0-71.79-generic 5.4.101 RelatedPackageVersions: linux-restricted-modules-5.4.0-71-generic N/A linux-backports-modules-5.4.0-71-generic N/A linux-firmware 1.187.10 Tags: focal Uname: Linux 5.4.0-71-generic x86_64 UnreportableReason: In diesem Bericht geht es um ein Paket, welches nicht installiert ist. UpgradeStatus: Upgraded to focal on 2020-11-22 (142 days ago) UserGroups: adm cdrom davfs2 dialout dip kvm libvirt lpadmin plugdev roccat sambashare scanner sudo vboxusers _MarkForUpload: False dmi.bios.date: 04/20/2020 dmi.bios.vendor: LENOVO dmi.bios.version: R0IET61W (1.39 ) dmi.board.asset.tag: Not Available dmi.board.name: 20HMS00T00 dmi.board.vendor: LENOVO dmi.board.version: Not Defined dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrR0IET61W(1.39):bd04/20/2020:svnLENOVO:pn20HMS00T00:pvrThinkPadX270:rvnLENOVO:rn20HMS00T00:rvrNotDefined:cvnLENOVO:ct10:cvrNone: dmi.product.family: ThinkPad X270 dmi.product.name: 20HMS00T00 dmi.product.sku: LENOVO_MT_20HM_BU_Think_FM_ThinkPad X270 dmi.product.version: ThinkPad X270 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1923670/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
